Process of producing images by transmitted light



Sept. 25 1923. 1,468,965 B. P. HALL PROCESS OF PRODUCING IMAGES BY TRANSMITTED LIGHT Filed March 25 1921 INVENTOR BU -ram P Hnu.

BY 71.12 s ATTORNEY Patented s 25, 1923.

UNITED STATES PATENT or-"Pics.

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Application filed larch 25. 1821. tulle-455,517.

To all whom it may concern:

Be it known that I, BmrroN P. HALL, a citizen of the United States, residin at Fanwood in the county of Union and tate of New Jersey, have invented a new and useful improvement in the processes of producing images by transmitted light which is applicable to photography and the production of motion ictures and other pictures projected on resecting surfaces, such as stereopticon views.

This invention consists in the novel feathe objects of it are:

First: to produce superior images by transmitted light;

Second: to have the process of producing said images comparatively simple and ine nsive.

attain these ob'ects by the following process, which is iagrammatically illustrated in the accompanying drawings, in which Fig. 1 is a plan partly in elevation, partly in section, and Fig. 2 is an edge view. First 'I prepare two or more photographic negatives 14 and 15 of the same objects, referably by simultaneous exposure through lianses 12 situated a suitable distance apart as shown in Fig. 1.

Second: I combine these negnfiiveshl l and 15 b superposing one upon t e 0t er; in this z vay I produce acomposite positive 16,

' v which in the case sultant picture,

of photography, is the reand in the case of motion p cture apparatuses'the composite positive is 35 the resultant picture on the film through which the light' is projected on to suitable reflecting surfaces.

When the negativesare prepared as above described, then, by superposing the said two or more negatives, theproduced will embody the objects to which the composite positive a superior image of negatives were exposed and will be superior to the positives produced from each of these'negatives separately in point of The foregoin graphs obtained b the lucidity of the images. statements refer to photoy the above described process and also-t0 the images projected on to suitable reflecting surfaces through the com- 5.

posite positives on the films,

obtained by superposition as above. described.

What I to secure by In the art of p mitted light the claim as my invention, and desire Letters Patent, is:

roducing imagm by transprocess of first preparing multiple component negatives of the same objects by the method of simultaneous exposure through lenses situated a suitable distance apart and then tives by superposition to p posite positive.

combining these negagee a com- BUBTON P. HALL. 

